Pipe-joint.



R. R. RUST.

-PIPB JOINT. APPLI-ATION FILED APB. 12, 1909. I 935,412, Patented Sept. 28, 1909.

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ROBERT n. nUsfr, or New YORK, N. Y,

PIPE-JOINT.

Specification of Letters Patent PatqgmtjeiSept-w 2S, 19:09

Application filed April 12, 1909. Serial No. 489,344.

To all whom it may concern:

Be it known that I, ROBERT R. RUST, a

citizen ef the United States of America, re siding in the borough of Manhattan, 'in the v were formerly necessary to be used where successive pipe lengths had to be laid out of alinement with each other, but special sections'or elbow joints, besides being expensive, were not satisfactory because not :adapted for all the varying angles which might be required, and onthe other hand, ball joints are Aalways difficult to make and maintain tight without packing, because of the difliculty of fitting accurately the extensive surface presented by the machined faces of a ball joint. It. has been attemptedto meetthese diiculties by providing pipe ends with straight tapering male and female ends, the

, tapers of the matching ends being different,

so that when those two ends 'are brought together, only a comparatively s/hort art of these two tapering surfaces will beml contact with each other. -Because of the elasticity of the metal composing such a jointd and because of thevery considerable c ompression obtained -by means of these slight tapers, it was possible by siich a construe. -tion to obtain a considerable deflection from (the joints. For this purpose-.I provide the meeting endv of one of the pipes with a curved surface, while the adjacent end ofthe next section has an. angular edge to ride upon and coperate with ,said .curved sur-` face, as hereinafter described. I

-J l p ,In the accompanyingdrawings Figure 1 is a sectional view of one form of pipe joint,

embodying my invention; Fig. 2 is a section drawn on larger scale of a part lof the j int; Fig. 3 is a sectional view of another form of joint; Fig. 4L is a sectionl drawn to a larger scale of a part of the same joint; Figs. 5, 6 and 7 are sectional views of other styles of pipe joints, embdyin my invention.

In Figs. 1, 2, 3 and 4, I have shown my invention as applied to a construction of pipe in which collars or lugs a, a, are formed on the pipe sections for the application thereto of bolts and nuts b to draw the sections together. At one end of one pipe section (A) is formed a projecting end piece C to enter a flaring mouth D on the end of the other sectionl B. The projecting end C is formed with an annular edge and also by preference curved externally, as shown in Fig. 2. 'Ihe flaring mouth D offtheother sect-ion B is curved, internally, to receive the projecting end of section A, so that when the bolts and nuts b are applied to draw the two parts together, said angular edge @c comes into contact with and rides upon the Acurved surface of the other part, and in such a way as to permit onepipe section to be laid out of alinement with the other part to a considerable degree, and yetfrely on securing a tightjoint between the meeting faces. A construction similar to that described is illustrated in Figs. 3 and 4, except that the projecting part C1 is externally rounded to receive the angular edge m1 of the mouth of the pipe section B.

In Fi' 5 I have shown joint constn'uctions embodying the above described improvement of a curvedface on one part combined with Aan angular edge on the other part, but the joint instead o rbeing formed directly on the pipe sections is formed on coupling rings R, R1, to which the pipel lengths P, P1 are' securedzvby screw threading. c

In the constructions so far described, I

*have shown the surface immediately behind f theangular edge as curved. Thus in Fig. 2, the surface 10 behindy the edge m 1s curved,

and in Fig. 4, the surface 1l immediately behind the abutting angular edgel :el is curved, and each such curve is eccentric to the curved face with which the angular edge so o erates., In the odications, Figs.` 6 and' however, I have shownfthe surfaces Iimmediately behind the angular edges asv parallel with the axis of the pipe, thus making the angular edge a little sharper than in the constructions, Figs. 1\'to 5.

I claim as my inventiono t l. A pipe joint, comprising one member having a curved surface in combination With another member having an angular edge to ride upon and eoperate with the curved surface on said other part.

2. A pipe joint comprising one member having a curved surface in combination with -another member having an angular' edge with curved surface on said other part, the surface immediately behind' Said angular edge being curved eccentrically to the curve 15 on the other member.

In testimony whereof vI have signed my name to this Specification, in the presence of two subscribing Witnesses.`

ROBERT R. RUST.

VVitneSses W'ALTER E. BUno11ss,' WILLIAM HALTUS. 

